Expert Chemistry Tutoring

MS1:

- Ability of an element to undergo chemical reactions (1)

MS2:

- Ionization energy increases down the group (1)

- Due to increasing distance between the nucleus and outermost electron (1)

- More energy required to remove an electron (1)

MS3:

- Metallic character decreases from left to right (1)

- Non-metallic character increases from left to right (1)

MS4:

- Correct identification of atomic number: 17 (1)

- Correct electron configuration: 2, 8, 7 (1)

- Electron configuration written in full (1)

MS5:

- Chlorine has more electron shells than potassium (1)

- Electron-electron repulsions increase atomic size (1)

- Potassium has a smaller nucleus than chlorine (1)

MS6:

- Metallic bonds involve mobile electrons (1)

- Covalent bonds involve shared electrons (1)

MS7:

MS8:

- Non-metals are more reactive than metals (1)

- Reactivity of metals increases down a group (1)

- Reactivity of non-metals decreases down a group (1)

MS9:

- Alkali metals have low ionization energies (1)

- Water molecules have a polar covalent bond (1)

- Electrons from the alkali metal are transferred to water molecules, forming hydrogen gas (1)

MS10:

- Moles of sodium: 5.85 g / 23.0 g/mol = 0.254 mol (1)

- Mole ratio Na : NaCl = 1 : 1

- Moles of NaCl: 0.254 mol (1)

- Mass of NaCl: 0.254 mol × 58.5 g/mol = 14.84 g (1)